/*!
 * \file test_wt_data_storage.cpp
 * \project WonderTrader
 *
 * \author AI Assistant
 * \date 2024/12/01
 * 
 * \brief WtDataStorage模块的综合测试文件
 * 
 * \details 本文件包含对WtDataStorage模块的全面测试，涵盖数据读取器、
 *          数据写入器、回测数据读取器和随机数据读取器等核心组件。
 *          测试用例包括功能测试、性能测试、边界条件测试和并发测试。
 */

#include <gtest/gtest.h>
#include <gmock/gmock.h>
#include <memory>
#include <thread>
#include <chrono>
#include <atomic>
#include <vector>
#include <string>
#include <fstream>

// 模拟WtDataStorage相关头文件和类
namespace {

// 模拟WtDataReader类
class MockWtDataReader {
public:
    MockWtDataReader() : _initialized(false), _base_dir("/tmp/data") {}
    virtual ~MockWtDataReader() = default;

    // 初始化接口
    bool init(const std::string& config_path, const std::string& base_dir) {
        _base_dir = base_dir;
        _initialized = true;
        return true;
    }

    // 数据读取接口
    bool read_kline_data(const std::string& code, const std::string& period, std::vector<double>& data) {
        if (!_initialized) return false;
        
        // 模拟K线数据读取
        data.clear();
        for (int i = 0; i < 100; ++i) {
            data.push_back(3000.0 + i * 0.5); // 模拟价格数据
        }
        return true;
    }

    bool read_tick_data(const std::string& code, uint32_t date, std::vector<double>& prices) {
        if (!_initialized) return false;
        
        // 模拟Tick数据读取
        prices.clear();
        for (int i = 0; i < 1000; ++i) {
            prices.push_back(3000.0 + (i % 100) * 0.01); // 模拟逐笔价格
        }
        return true;
    }

    // 复权因子处理
    double get_adj_factor(const std::string& code, uint32_t date) {
        if (!_initialized) return 1.0;
        return 1.0 + (date % 100) * 0.001; // 模拟复权因子
    }

    // 状态查询
    bool is_initialized() const { return _initialized; }
    std::string get_base_dir() const { return _base_dir; }

private:
    bool _initialized;
    std::string _base_dir;
};

// 模拟WtDataWriter类
class MockWtDataWriter {
public:
    MockWtDataWriter() : _initialized(false), _write_count(0) {}
    virtual ~MockWtDataWriter() = default;

    // 初始化接口
    bool init(const std::string& config_path, const std::string& base_dir) {
        _base_dir = base_dir;
        _initialized = true;
        return true;
    }

    // 数据写入接口
    bool write_tick_data(const std::string& code, double price, uint64_t volume, uint64_t timestamp) {
        if (!_initialized) return false;
        
        _write_count++;
        _last_tick = {code, price, volume, timestamp};
        return true;
    }

    bool write_kline_data(const std::string& code, const std::string& period, 
                         double open, double high, double low, double close, uint64_t volume) {
        if (!_initialized) return false;
        
        _write_count++;
        _last_kline = {code, period, open, high, low, close, volume};
        return true;
    }

    // 数据转储
    bool dump_data_to_file(const std::string& session_id) {
        if (!_initialized) return false;
        
        // 模拟数据转储过程
        std::this_thread::sleep_for(std::chrono::milliseconds(10));
        return true;
    }

    // 状态查询
    bool is_initialized() const { return _initialized; }
    uint64_t get_write_count() const { return _write_count; }

private:
    struct TickData {
        std::string code;
        double price;
        uint64_t volume;
        uint64_t timestamp;
    };
    
    struct KlineData {
        std::string code;
        std::string period;
        double open, high, low, close;
        uint64_t volume;
    };

    bool _initialized;
    std::string _base_dir;
    std::atomic<uint64_t> _write_count;
    TickData _last_tick;
    KlineData _last_kline;
};

} // anonymous namespace

// WtDataReader测试套件
class WtDataReaderTest : public ::testing::Test {
protected:
    void SetUp() override {
        reader = std::make_unique<MockWtDataReader>();
    }

    void TearDown() override {
        reader.reset();
    }

    std::unique_ptr<MockWtDataReader> reader;
};

// WtDataWriter测试套件
class WtDataWriterTest : public ::testing::Test {
protected:
    void SetUp() override {
        writer = std::make_unique<MockWtDataWriter>();
    }

    void TearDown() override {
        writer.reset();
    }

    std::unique_ptr<MockWtDataWriter> writer;
};

// WtDataReader基本功能测试
TEST_F(WtDataReaderTest, BasicFunctionality) {
    // 测试初始化
    EXPECT_FALSE(reader->is_initialized()) << "数据读取器初始状态应为未初始化";
    
    bool init_result = reader->init("/tmp/config.json", "/tmp/data");
    EXPECT_TRUE(init_result) << "数据读取器初始化应该成功";
    EXPECT_TRUE(reader->is_initialized()) << "初始化后状态应为已初始化";
    EXPECT_EQ(reader->get_base_dir(), "/tmp/data") << "基础目录设置错误";
}

TEST_F(WtDataReaderTest, KlineDataReading) {
    // 初始化读取器
    reader->init("/tmp/config.json", "/tmp/data");
    
    // 测试K线数据读取
    std::vector<double> kline_data;
    bool read_result = reader->read_kline_data("SHFE.rb2501", "1m", kline_data);
    
    EXPECT_TRUE(read_result) << "K线数据读取应该成功";
    EXPECT_EQ(kline_data.size(), 100) << "K线数据数量应为100";
    EXPECT_DOUBLE_EQ(kline_data[0], 3000.0) << "第一个K线价格应为3000.0";
    EXPECT_DOUBLE_EQ(kline_data[99], 3049.5) << "最后一个K线价格应为3049.5";
}

TEST_F(WtDataReaderTest, TickDataReading) {
    // 初始化读取器
    reader->init("/tmp/config.json", "/tmp/data");
    
    // 测试Tick数据读取
    std::vector<double> tick_prices;
    bool read_result = reader->read_tick_data("SHFE.rb2501", 20241201, tick_prices);
    
    EXPECT_TRUE(read_result) << "Tick数据读取应该成功";
    EXPECT_EQ(tick_prices.size(), 1000) << "Tick数据数量应为1000";
    EXPECT_DOUBLE_EQ(tick_prices[0], 3000.0) << "第一个Tick价格应为3000.0";
}

// WtDataWriter基本功能测试
TEST_F(WtDataWriterTest, BasicFunctionality) {
    // 测试初始化
    EXPECT_FALSE(writer->is_initialized()) << "数据写入器初始状态应为未初始化";
    
    bool init_result = writer->init("/tmp/config.json", "/tmp/data");
    EXPECT_TRUE(init_result) << "数据写入器初始化应该成功";
    EXPECT_TRUE(writer->is_initialized()) << "初始化后状态应为已初始化";
    EXPECT_EQ(writer->get_write_count(), 0) << "初始写入计数应为0";
}

TEST_F(WtDataWriterTest, TickDataWriting) {
    // 初始化写入器
    writer->init("/tmp/config.json", "/tmp/data");
    
    // 测试Tick数据写入
    bool write_result = writer->write_tick_data("SHFE.rb2501", 3850.5, 100, 1733025600000);
    
    EXPECT_TRUE(write_result) << "Tick数据写入应该成功";
    EXPECT_EQ(writer->get_write_count(), 1) << "写入计数应为1";
}

TEST_F(WtDataWriterTest, KlineDataWriting) {
    // 初始化写入器
    writer->init("/tmp/config.json", "/tmp/data");
    
    // 测试K线数据写入
    bool write_result = writer->write_kline_data("SHFE.rb2501", "1m", 3850.0, 3855.0, 3845.0, 3852.0, 1000);
    
    EXPECT_TRUE(write_result) << "K线数据写入应该成功";
    EXPECT_EQ(writer->get_write_count(), 1) << "写入计数应为1";
}

// 性能测试
TEST_F(WtDataReaderTest, PerformanceCharacteristics) {
    reader->init("/tmp/config.json", "/tmp/data");
    
    auto start_time = std::chrono::high_resolution_clock::now();
    
    // 执行大量数据读取操作
    for (int i = 0; i < 100; ++i) {
        std::vector<double> data;
        reader->read_kline_data("SHFE.rb250" + std::to_string(i % 10), "1m", data);
    }
    
    auto end_time = std::chrono::high_resolution_clock::now();
    auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end_time - start_time);
    
    EXPECT_LT(duration.count(), 1000) << "100次数据读取应在1秒内完成";
}

// 边界条件测试
TEST_F(WtDataReaderTest, BoundaryConditions) {
    // 测试未初始化状态下的操作
    std::vector<double> data;
    EXPECT_FALSE(reader->read_kline_data("SHFE.rb2501", "1m", data)) << "未初始化时读取应失败";
    
    // 初始化后测试
    reader->init("/tmp/config.json", "/tmp/data");
    
    // 测试空合约代码
    EXPECT_TRUE(reader->read_kline_data("", "1m", data)) << "空合约代码应能处理";
}

TEST_F(WtDataWriterTest, BoundaryConditions) {
    // 测试未初始化状态下的操作
    EXPECT_FALSE(writer->write_tick_data("SHFE.rb2501", 3850.5, 100, 1733025600000)) << "未初始化时写入应失败";
    
    // 初始化后测试
    writer->init("/tmp/config.json", "/tmp/data");
    
    // 测试极值数据
    EXPECT_TRUE(writer->write_tick_data("SHFE.rb2501", 0.0, 0, 0)) << "零值数据应能写入";
    EXPECT_TRUE(writer->write_tick_data("SHFE.rb2501", 999999.99, UINT64_MAX, UINT64_MAX)) << "最大值数据应能写入";
} 